copying rafalib instructions to week1 as well
copying rafalib instructions to week1 as well


Former-commit-id: 532ada0fcf48bb164d61f68317c6ea1ddb93101f
btadams/labs,itenente/labs,mudit2013/labs,sivarome/labs,genomicsclass/labs,VeryFatBoy/labs,apreshill/labs,DhiruPranav/labs,molx/labs,gopakumargeetha/labs,bioJain/labs,luca-scr/labs,crazyhottommy/labs,FellowsCR/R-Files,juvchan/labs,neeraj0510/labs,joseffrank/labs,ste-fan/labs,helixcn/labs,idworkin/labs,jelewis/labs,prophets/labs,ghellstern/labs,psaxcode/New-Stat-Genomics,idworkin/labs,DSJacq/labs,vladovidiulupu/labs,mcolic/labs,joseffrank/labs,noelnamai/labs,jasdominika/labs,juvchan/labs,gdtm86/labs,bgolla/labs,sivarome/labs,apreshill/labs,VeryFatBoy/labs,fxcebx/labs,genomicsclass/labs,fxcebx/labs,pr07809/labs,Lotus-Moon/Lotus-Ragam